About Me
Lead Software Engineer
& AI Systems Builder
David Inyang-Etoh
Lead Software Engineer
I'm a Lead Software Engineer with 8+ years of experience building and scaling SaaS and FinTech platforms across Europe, the US, and Africa — currently leading backend and cloud infrastructure at Collectwire Technologies.
I specialise in cloud-native, event-driven microservices — helping teams move from monolithic systems to distributed architectures that are reliable, cost-efficient, and built to last. Over the years I've cut AWS costs by 66%, boosted API performance by 35%, and shipped production systems used by 10,000+ users across multiple continents.
In the last year, I've deliberately expanded into AI Engineering — not just integrating APIs, but understanding the stack from the ground up. RAG pipelines, fine-tuning with QLoRA, agentic systems, MCP tooling. I believe the engineers who understand both the infrastructure layer and the AI layer will build the most valuable products in the next decade.
I enjoy solving complex backend challenges, mentoring engineers, and leveraging AI-assisted development to ship better products faster.
Get In Touch
Honors
Award of Excellence in Mentorship
Certificate of Appreciation as Hackathon Judge
Building with AI, Not Just Talking About It
The shift from “searching” to “asking” is here. I'm building the engines that power that transition.
AI is shifting how users interact with software. I've been exploring this shift hands-on — building systems where LLMs act as the interface, not just an add-on. I design AI systems that don't just generate text — but retrieve, reason, and act.
AI Engineer Core Track: LLM Engineering, RAG, QLoRA, Agents
Udemy · Ed Donner · 33.5 hours · March 2026
End-to-end AI engineering — from LLM internals and prompt engineering to building production RAG systems, fine-tuning open-source models with QLoRA, and deploying autonomous agents. Hands-on with 20+ frontier models including GPT-4, Claude, Gemini, Llama, and Mistral.
AI Leader: Generative AI & Agentic AI for Leaders & Founders
Udemy · Ed Donner · 3.5 hours · March 2026
Focused on applying AI at a business level — identifying opportunities, leading AI initiatives, and delivering measurable impact. Bridges the gap between engineering and business value.
Agentic AI Engineering: The Complete Agent & MCP Course
Udemy · Ed Donner · 6-week intensive
Deep dive into autonomous AI systems using modern agent frameworks and design patterns. Building 8 real-world agentic projects.
Skills & Technologies
Core Languages
Frameworks & Libraries
Cloud & DevOps
Databases & Messaging
Architecture Patterns
AI & Integrations
Work Experience
Collectwire
CurrentLead Software Engineer
Jan 2025 – Present
Remote
Led a team of 4 engineers to architect and ship a global payroll SaaS MVP — 8 event-driven microservices, 7 months from zero to beta. Cut AWS costs by 66% and accelerated team delivery by 3x using AI-assisted development tools.
- ▸Accelerated team delivery by 3x by leveraging AI-assisted development tools (Cursor, Claude) for architecture design, documentation, and cost-benefit analysis
- ▸Slashed AWS infrastructure costs by 66% (from $200+ to $67/month) by migrating to TypeScript CDK and optimising cloud resources
- ▸Architected 8 event-driven microservices, achieving beta launch within 7 months
- ▸Reduced redundant API calls by up to 80% across three frontend apps via multi-tenant request headers and RTK Query caching
receeve
Senior Software Engineer
Jan 2023 – Sep 2024
Hamburg, Germany (Remote)
Modernised a monolithic orchestration engine into serverless AWS Lambda microservices — improving execution speed by 47%, reducing API response times by 35% with CQRS + GraphQL, and integrating OpenAI APIs for AI-driven payment summaries.
- ▸Improved engine execution speed by 47% by redesigning a monolithic service into three serverless microservices using AWS Lambda
- ▸Decreased API response times by 35% by implementing CQRS with a GraphQL Gateway
- ▸Integrated OpenAI APIs for AI-driven payment summaries and predictions — improving engagement by 10% and reducing manual review time by 25%
- ▸Achieved 99.9% deployment reliability with AWS CDK and GitHub Actions
Immutable
Full Stack Software Engineer
Sep 2021 – Nov 2022
Sydney, Australia (Remote)
Revamped NFT checkout and payment flows for a Web3 trading platform, building Wallet and Order microservices with NestJS, Kafka, and PostgreSQL. Implemented distributed Redlock to eliminate duplicate minting under concurrent load.
- ▸Built Wallet and Order microservices with NestJS + Kafka
- ▸Redis-based distributed locking for NFT minting
- ▸Automated deployments on AWS ECS
- ▸Solidity smart contract contributions
Jiggle
Software Engineer & Co-Founder
Nov 2019 – Jun 2021
Uyo, Nigeria
Co-founded and architected a multi-currency digital wallet with 10,000+ active users.
- ▸10,000+ active users
- ▸Paystack & Flutterwave integrations
- ▸Scaled team from 3 to 7 members
- ▸Transaction monitoring dashboard
VisionDev
Full-Stack Engineer
Jan 2017 – Oct 2019
Provo, Utah, USA (Remote)
Developed automated timesheet and payroll systems integrated with Twilio APIs.
- ▸Payroll system for 500+ employees
- ▸Inventory and POS APIs for multi-tenant SaaS
- ▸Refactored legacy ticketing platform
- ▸Vue.js frontend modernization
Education
University of Port Harcourt
B.Eng, Mechanical Engineering
2005 – 2012